This map shows the contour of the elevation of the land. This type of map can also be classified as a Digital Elevation Model (DEM) as part of the National Elevation Dataset (NED). The NED provides dataset from raster elevation data. As part of the USGS, it provides information and maps for the US, Alaska, Hawaii, and US territories. Not only are these maps updated on an average of two months, but they are also public domain. This helps provide resources for other maps as well as maintain current maps and higher resolution as technology is improved.
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